lustre/ost/ost_handler.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *   Author: Peter J. Braam <braam@clusterfs.com>
   6  *   Author: Phil Schwan <phil@clusterfs.com>
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  *  Storage Target Handling functions
  24  *  Lustre Object Server Module (OST)
  25  *
  26  *  This server is single threaded at present (but can easily be multi
  27  *  threaded). For testing and management it is treated as an
  28  *  obd_device, although it does not export a full OBD method table
  29  *  (the requests are coming in over the wire, so object target
  30  *  modules do not have a full method table.)
  31  */
  32
  33 #define EXPORT_SYMTAB
  34 #define DEBUG_SUBSYSTEM S_OST
  35
  36 #include <linux/module.h>
  37 #include <linux/obd_ost.h>
  38 #include <linux/lustre_net.h>
  39 #include <linux/lustre_dlm.h>
  40 #include <linux/lustre_export.h>
  41 #include <linux/init.h>
  42 #include <linux/lprocfs_status.h>
  43 #include <linux/lustre_commit_confd.h>
  44 #include <portals/list.h>
  45
  46 void oti_init(struct obd_trans_info *oti, struct ptlrpc_request *req)
  47 {
  48         if (oti == NULL)
  49                 return;
  50         memset(oti, 0, sizeof *oti);
  51
  52         if (req->rq_repmsg && req->rq_reqmsg != 0)
  53                 oti->oti_transno = req->rq_repmsg->transno;
  54 }
  55
  56 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
  57 {
  58         struct oti_req_ack_lock *ack_lock;
  59         int i;
  60
  61         if (oti == NULL)
  62                 return;
  63
  64         if (req->rq_repmsg)
  65                 req->rq_repmsg->transno = oti->oti_transno;
  66
  67         /* XXX 4 == entries in oti_ack_locks??? */
  68         for (ack_lock = oti->oti_ack_locks, i = 0; i < 4; i++, ack_lock++) {
  69                 if (!ack_lock->mode)
  70                         break;
  71                 memcpy(&req->rq_ack_locks[i].lock, &ack_lock->lock,
  72                        sizeof(req->rq_ack_locks[i].lock));
  73                 req->rq_ack_locks[i].mode = ack_lock->mode;
  74         }
  75 }
  76
  77 static int ost_destroy(struct ptlrpc_request *req, struct obd_trans_info *oti)
  78 {
  79         struct lustre_handle *conn = &req->rq_reqmsg->handle;
  80         struct ost_body *body;
  81         int rc, size = sizeof(*body);
  82         ENTRY;
  83
  84         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
  85         if (body == NULL)
  86                 RETURN(-EFAULT);
  87
  88         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
  89         if (rc)
  90                 RETURN(rc);
  91
  92         if (body->oa.o_valid & OBD_MD_FLCOOKIE)
  93                 oti->oti_logcookies = obdo_logcookie(&body->oa);
  94         req->rq_status = obd_destroy(conn, &body->oa, NULL, oti);
  95         RETURN(0);
  96 }
  97
  98 static int ost_getattr(struct ptlrpc_request *req)
  99 {
 100         struct lustre_handle *conn = (struct lustre_handle *)req->rq_reqmsg;
 101         struct ost_body *body, *repbody;
 102         int rc, size = sizeof(*body);
 103         ENTRY;
 104
 105         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 106         if (body == NULL)
 107                 RETURN(-EFAULT);
 108
 109         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 110         if (rc)
 111                 RETURN(rc);
 112
 113         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 114         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 115         req->rq_status = obd_getattr(conn, &repbody->oa, NULL);
 116         RETURN(0);
 117 }
 118
 119 static int ost_statfs(struct ptlrpc_request *req)
 120 {
 121         struct obd_statfs *osfs;
 122         int rc, size = sizeof(*osfs);
 123         ENTRY;
 124
 125         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 126         if (rc)
 127                 RETURN(rc);
 128
 129         osfs = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*osfs));
 130
 131         req->rq_status = obd_statfs(req->rq_export->exp_obd, osfs, jiffies-HZ);
 132         if (req->rq_status != 0)
 133                 CERROR("ost: statfs failed: rc %d\n", req->rq_status);
 134
 135         RETURN(0);
 136 }
 137
 138 static int ost_syncfs(struct ptlrpc_request *req)
 139 {
 140         struct obd_statfs *osfs;
 141         int rc, size = sizeof(*osfs);
 142         ENTRY;
 143
 144         rc = lustre_pack_msg(0, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 145         if (rc)
 146                 RETURN(rc);
 147
 148         rc = obd_syncfs(req->rq_export);
 149         if (rc) {
 150                 CERROR("ost: syncfs failed: rc %d\n", rc);
 151                 req->rq_status = rc;
 152                 RETURN(rc);
 153         }
 154
 155         RETURN(0);
 156 }
 157
 158 static int ost_open(struct ptlrpc_request *req, struct obd_trans_info *oti)
 159 {
 160         struct lustre_handle *conn = (struct lustre_handle *)req->rq_reqmsg;
 161         struct ost_body *body, *repbody;
 162         int rc, size = sizeof(*repbody);
 163         ENTRY;
 164
 165         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 166         if (body == NULL)
 167                 RETURN(-EFAULT);
 168
 169         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 170         if (rc)
 171                 RETURN(rc);
 172
 173         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 174         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 175         req->rq_status = obd_open(conn, &repbody->oa, NULL, oti, NULL);
 176         RETURN(0);
 177 }
 178
 179 static int ost_close(struct ptlrpc_request *req, struct obd_trans_info *oti)
 180 {
 181         struct lustre_handle *conn = (struct lustre_handle *)req->rq_reqmsg;
 182         struct ost_body *body, *repbody;
 183         int rc, size = sizeof(*repbody);
 184         ENTRY;
 185
 186         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 187         if (body == NULL)
 188                 RETURN(-EFAULT);
 189
 190         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 191         if (rc)
 192                 RETURN(rc);
 193
 194         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 195         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 196         req->rq_status = obd_close(conn, &repbody->oa, NULL, oti);
 197         RETURN(0);
 198 }
 199
 200 static int ost_create(struct ptlrpc_request *req, struct obd_trans_info *oti)
 201 {
 202         struct lustre_handle *conn = (struct lustre_handle *)req->rq_reqmsg;
 203         struct ost_body *body, *repbody;
 204         int rc, size = sizeof(*repbody);
 205         ENTRY;
 206
 207         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 208         if (body == NULL)
 209                 RETURN(-EFAULT);
 210
 211         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 212         if (rc)
 213                 RETURN(rc);
 214
 215         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 216         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 217         oti->oti_logcookies = obdo_logcookie(&repbody->oa);
 218         req->rq_status = obd_create(conn, &repbody->oa, NULL, oti);
 219         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
 220         RETURN(0);
 221 }
 222
 223 static int ost_punch(struct ptlrpc_request *req, struct obd_trans_info *oti)
 224 {
 225         struct lustre_handle *conn = (struct lustre_handle *)req->rq_reqmsg;
 226         struct ost_body *body, *repbody;
 227         int rc, size = sizeof(*repbody);
 228         ENTRY;
 229
 230         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 231         if (body == NULL)
 232                 RETURN(-EFAULT);
 233
 234         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 235             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 236                 RETURN(-EINVAL);
 237
 238         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 239         if (rc)
 240                 RETURN(rc);
 241
 242         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 243         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 244         req->rq_status = obd_punch(conn, &repbody->oa, NULL, repbody->oa.o_size,
 245                                    repbody->oa.o_blocks, oti);
 246         RETURN(0);
 247 }
 248
 249 static int ost_setattr(struct ptlrpc_request *req, struct obd_trans_info *oti)
 250 {
 251         struct lustre_handle *conn = &req->rq_reqmsg->handle;
 252         struct ost_body *body, *repbody;
 253         int rc, size = sizeof(*repbody);
 254         ENTRY;
 255
 256         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 257         if (body == NULL)
 258                 RETURN(-EFAULT);
 259
 260         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 261         if (rc)
 262                 RETURN(rc);
 263
 264         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 265         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 266
 267         req->rq_status = obd_setattr(conn, &repbody->oa, NULL, oti);
 268         RETURN(0);
 269 }
 270
 271 static int ost_bulk_timeout(void *data)
 272 {
 273         ENTRY;
 274         /* We don't fail the connection here, because having the export
 275          * killed makes the (vital) call to commitrw very sad.
 276          */
 277         RETURN(1);
 278 }
 279
 280 static int get_per_page_niobufs(struct obd_ioobj *ioo, int nioo,
 281                                 struct niobuf_remote *rnb, int nrnb,
 282                                 struct niobuf_remote **pp_rnbp)
 283 {
 284         /* Copy a remote niobuf, splitting it into page-sized chunks
 285          * and setting ioo[i].ioo_bufcnt accordingly */
 286         struct niobuf_remote *pp_rnb;
 287         int   i;
 288         int   j;
 289         int   page;
 290         int   rnbidx = 0;
 291         int   npages = 0;
 292
 293         /* first count and check the number of pages required */
 294         for (i = 0; i < nioo; i++)
 295                 for (j = 0; j < ioo->ioo_bufcnt; j++, rnbidx++) {
 296                         obd_off offset = rnb[rnbidx].offset;
 297                         obd_off p0 = offset >> PAGE_SHIFT;
 298                         obd_off pn = (offset + rnb[rnbidx].len - 1)>>PAGE_SHIFT;
 299
 300                         LASSERT(rnbidx < nrnb);
 301
 302                         npages += (pn + 1 - p0);
 303
 304                         if (rnb[rnbidx].len == 0) {
 305                                 CERROR("zero len BRW: obj %d objid "LPX64
 306                                        " buf %u\n", i, ioo[i].ioo_id, j);
 307                                 return -EINVAL;
 308                         }
 309                         if (j > 0 &&
 310                             rnb[rnbidx].offset <= rnb[rnbidx-1].offset) {
 311                                 CERROR("unordered BRW: obj %d objid "LPX64
 312                                        " buf %u offset "LPX64" <= "LPX64"\n",
 313                                        i, ioo[i].ioo_id, j, rnb[rnbidx].offset,
 314                                        rnb[rnbidx].offset);
 315                                 return -EINVAL;
 316                         }
 317                 }
 318
 319         LASSERT(rnbidx == nrnb);
 320
 321         if (npages == nrnb) {       /* all niobufs are for single pages */
 322                 *pp_rnbp = rnb;
 323                 return npages;
 324         }
 325
 326         OBD_ALLOC(pp_rnb, sizeof(*pp_rnb) * npages);
 327         if (pp_rnb == NULL)
 328                 return -ENOMEM;
 329
 330         /* now do the actual split */
 331         page = rnbidx = 0;
 332         for (i = 0; i < nioo; i++) {
 333                 int  obj_pages = 0;
 334
 335                 for (j = 0; j < ioo[i].ioo_bufcnt; j++, rnbidx++) {
 336                         obd_off off = rnb[rnbidx].offset;
 337                         int     nob = rnb[rnbidx].len;
 338
 339                         LASSERT(rnbidx < nrnb);
 340                         do {
 341                                 obd_off  poff = off & (PAGE_SIZE - 1);
 342                                 int      pnob = (poff + nob > PAGE_SIZE) ?
 343                                                 PAGE_SIZE - poff : nob;
 344
 345                                 LASSERT(page < npages);
 346                                 pp_rnb[page].len = pnob;
 347                                 pp_rnb[page].offset = off;
 348                                 pp_rnb[page].flags = rnb->flags;
 349
 350                                 CDEBUG(D_PAGE, "   obj %d id "LPX64
 351                                        "page %d(%d) "LPX64" for %d\n",
 352                                        i, ioo[i].ioo_id, obj_pages, page,
 353                                        pp_rnb[page].offset, pp_rnb[page].len);
 354                                 page++;
 355                                 obj_pages++;
 356
 357                                 off += pnob;
 358                                 nob -= pnob;
 359                         } while (nob > 0);
 360                         LASSERT(nob == 0);
 361                 }
 362                 ioo[i].ioo_bufcnt = obj_pages;
 363         }
 364         LASSERT(page == npages);
 365
 366         *pp_rnbp = pp_rnb;
 367         return npages;
 368 }
 369
 370 static void free_per_page_niobufs (int npages, struct niobuf_remote *pp_rnb,
 371                                    struct niobuf_remote *rnb)
 372 {
 373         if (pp_rnb == rnb)                      /* didn't allocate above */
 374                 return;
 375
 376         OBD_FREE(pp_rnb, sizeof(*pp_rnb) * npages);
 377 }
 378
 379 #if CHECKSUM_BULK
 380 __u64 ost_checksum_bulk (struct ptlrpc_bulk_desc *desc)
 381 {
 382         __u64             cksum = 0;
 383         struct ptlrpc_bulk_page *bp;
 384
 385         list_for_each_entry(bp, &desc->bd_page_list, bp_link) {
 386                 ost_checksum(&cksum, kmap(bp->bp_page) + bp->bp_pageoffset,
 387                              bp->bp_buflen);
 388                 kunmap(bp->bp_page);
 389         }
 390 }
 391 #endif
 392
 393 static int ost_brw_read(struct ptlrpc_request *req)
 394 {
 395         struct ptlrpc_bulk_desc *desc;
 396         struct niobuf_remote    *remote_nb;
 397         struct niobuf_remote    *pp_rnb;
 398         struct niobuf_local     *local_nb;
 399         struct obd_ioobj        *ioo;
 400         struct ost_body         *body, *repbody;
 401         struct l_wait_info       lwi;
 402         struct obd_trans_info    oti = { 0 };
 403         int                      size[1] = { sizeof(*body) };
 404         int                      comms_error = 0;
 405         int                      niocount;
 406         int                      npages;
 407         int                      nob = 0;
 408         int                      rc;
 409         int                      i;
 410         ENTRY;
 411
 412         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 413                 GOTO(out, rc = -EIO);
 414
 415         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 416         if (body == NULL) {
 417                 CERROR("Missing/short ost_body\n");
 418                 GOTO(out, rc = -EFAULT);
 419         }
 420
 421         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 422         if (ioo == NULL) {
 423                 CERROR("Missing/short ioobj\n");
 424                 GOTO(out, rc = -EFAULT);
 425         }
 426
 427         niocount = ioo->ioo_bufcnt;
 428         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 429                                        lustre_swab_niobuf_remote);
 430         if (remote_nb == NULL) {
 431                 CERROR("Missing/short niobuf\n");
 432                 GOTO(out, rc = -EFAULT);
 433         }
 434         if (lustre_msg_swabbed(req->rq_reqmsg)) { /* swab remaining niobufs */
 435                 for (i = 1; i < niocount; i++)
 436                         lustre_swab_niobuf_remote (&remote_nb[i]);
 437         }
 438
 439         size[0] = sizeof(*body);
 440         rc = lustre_pack_msg(1, size, NULL, &req->rq_replen, &req->rq_repmsg);
 441         if (rc)
 442                 GOTO(out, rc);
 443
 444         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 445         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 446         npages = get_per_page_niobufs(ioo, 1, remote_nb, niocount, &pp_rnb);
 447         if (npages < 0)
 448                 GOTO(out, rc = npages);
 449
 450         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 451         if (local_nb == NULL)
 452                 GOTO(out_pp_rnb, rc = -ENOMEM);
 453
 454         desc = ptlrpc_prep_bulk_exp(req, BULK_PUT_SOURCE, OST_BULK_PORTAL);
 455         if (desc == NULL)
 456                 GOTO(out_local, rc = -ENOMEM);
 457
 458         rc = obd_preprw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 459                         ioo, npages, pp_rnb, local_nb, &oti);
 460         if (rc != 0)
 461                 GOTO(out_bulk, rc);
 462
 463         nob = 0;
 464         for (i = 0; i < npages; i++) {
 465                 int page_rc = local_nb[i].rc;
 466
 467                 if (page_rc < 0) {              /* error */
 468                         rc = page_rc;
 469                         break;
 470                 }
 471
 472                 LASSERT(page_rc <= pp_rnb[i].len);
 473                 nob += page_rc;
 474                 if (page_rc != 0) {             /* some data! */
 475                         LASSERT (local_nb[i].page != NULL);
 476                         rc = ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 477                                                    pp_rnb[i].offset& ~PAGE_MASK,
 478                                                    page_rc);
 479                         if (rc != 0)
 480                                 break;
 481                 }
 482
 483                 if (page_rc != pp_rnb[i].len) { /* short read */
 484                         /* All subsequent pages should be 0 */
 485                         while(++i < npages)
 486                                 LASSERT(local_nb[i].rc == 0);
 487                         break;
 488                 }
 489         }
 490
 491         if (rc == 0) {
 492                 rc = ptlrpc_bulk_put(desc);
 493                 if (rc == 0) {
 494                         lwi = LWI_TIMEOUT(obd_timeout * HZ, ost_bulk_timeout,
 495                                           desc);
 496                         rc = l_wait_event(desc->bd_waitq,
 497                                           ptlrpc_bulk_complete(desc), &lwi);
 498                         if (rc) {
 499                                 LASSERT(rc == -ETIMEDOUT);
 500                                 CERROR ("timeout waiting for bulk PUT\n");
 501                                 ptlrpc_abort_bulk(desc);
 502                         }
 503                 } else {
 504                         CERROR("ptlrpc_bulk_put failed RC: %d\n", rc);
 505                 }
 506                 comms_error = rc != 0;
 507         }
 508
 509         /* Must commit after prep above in all cases */
 510         rc = obd_commitrw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 511                           ioo, npages, local_nb, &oti);
 512
 513         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 514         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 515
 516 #if CHECKSUM_BULK
 517         if (rc == 0) {
 518                 repbody->oa.o_rdev = ost_checksum_bulk(desc);
 519                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 520         }
 521 #endif
 522
 523  out_bulk:
 524         ptlrpc_free_bulk(desc);
 525  out_local:
 526         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 527  out_pp_rnb:
 528         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 529  out:
 530         LASSERT(rc <= 0);
 531         if (rc == 0) {
 532                 req->rq_status = nob;
 533                 ptlrpc_reply(req);
 534         } else if (!comms_error) {
 535                 /* only reply if comms OK */
 536                 req->rq_status = rc;
 537                 ptlrpc_error(req);
 538         } else {
 539                 if (req->rq_repmsg != NULL) {
 540                         /* reply out callback would free */
 541                         OBD_FREE(req->rq_repmsg, req->rq_replen);
 542                 }
 543                 CERROR("bulk IO comms error: evicting %s@%s nid "LPU64"\n",
 544                        req->rq_export->exp_client_uuid.uuid,
 545                        req->rq_connection->c_remote_uuid.uuid,
 546                        req->rq_connection->c_peer.peer_nid);
 547                 ptlrpc_fail_export(req->rq_export);
 548         }
 549
 550         RETURN(rc);
 551 }
 552
 553 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 554 {
 555         struct ptlrpc_bulk_desc *desc;
 556         struct niobuf_remote    *remote_nb;
 557         struct niobuf_remote    *pp_rnb;
 558         struct niobuf_local     *local_nb;
 559         struct obd_ioobj        *ioo;
 560         struct ost_body         *body, *repbody;
 561         struct l_wait_info       lwi;
 562         __u32                   *rcs;
 563         int                      size[2] = { sizeof(*body) };
 564         int                      objcount, niocount, npages;
 565         int                      comms_error = 0;
 566         int                      rc, rc2, swab, i, j;
 567         ENTRY;
 568
 569         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 570                 GOTO(out, rc = -EIO);
 571
 572         /* pause before transaction has been started */
 573         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 574                          obd_timeout +1);
 575
 576         swab = lustre_msg_swabbed(req->rq_reqmsg);
 577         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 578         if (body == NULL) {
 579                 CERROR("Missing/short ost_body\n");
 580                 GOTO(out, rc = -EFAULT);
 581         }
 582
 583         LASSERT_REQSWAB(req, 1);
 584         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 585         if (objcount == 0) {
 586                 CERROR("Missing/short ioobj\n");
 587                 GOTO(out, rc = -EFAULT);
 588         }
 589         ioo = lustre_msg_buf (req->rq_reqmsg, 1, objcount * sizeof(*ioo));
 590         LASSERT (ioo != NULL);
 591         for (niocount = i = 0; i < objcount; i++) {
 592                 if (swab)
 593                         lustre_swab_obd_ioobj (&ioo[i]);
 594                 if (ioo[i].ioo_bufcnt == 0) {
 595                         CERROR("ioo[%d] has zero bufcnt\n", i);
 596                         GOTO(out, rc = -EFAULT);
 597                 }
 598                 niocount += ioo[i].ioo_bufcnt;
 599         }
 600
 601         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 602                                        lustre_swab_niobuf_remote);
 603         if (remote_nb == NULL) {
 604                 CERROR("Missing/short niobuf\n");
 605                 GOTO(out, rc = -EFAULT);
 606         }
 607         if (swab) {                             /* swab the remaining niobufs */
 608                 for (i = 1; i < niocount; i++)
 609                         lustre_swab_niobuf_remote (&remote_nb[i]);
 610         }
 611
 612         size[1] = niocount * sizeof(*rcs);
 613         rc = lustre_pack_msg(2, size, NULL, &req->rq_replen,
 614                              &req->rq_repmsg);
 615         if (rc != 0)
 616                 GOTO(out, rc);
 617         rcs = lustre_msg_buf(req->rq_repmsg, 1, niocount * sizeof(*rcs));
 618
 619         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 620         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 621         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 622         if (npages < 0)
 623                 GOTO(out, rc = npages);
 624
 625         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 626         if (local_nb == NULL)
 627                 GOTO(out_pp_rnb, rc = -ENOMEM);
 628
 629         desc = ptlrpc_prep_bulk_exp(req, BULK_GET_SINK, OST_BULK_PORTAL);
 630         if (desc == NULL)
 631                 GOTO(out_local, rc = -ENOMEM);
 632
 633         rc = obd_preprw(OBD_BRW_WRITE, req->rq_export, &body->oa, objcount,
 634                         ioo, npages, pp_rnb, local_nb, oti);
 635         if (rc != 0)
 636                 GOTO(out_bulk, rc);
 637
 638         /* NB Having prepped, we must commit... */
 639
 640         for (i = 0; i < npages; i++) {
 641                 rc = ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 642                                            pp_rnb[i].offset & (PAGE_SIZE - 1),
 643                                            pp_rnb[i].len);
 644                 if (rc != 0)
 645                         break;
 646         }
 647
 648         if (rc == 0) {
 649                 rc = ptlrpc_bulk_get(desc);
 650                 if (rc == 0) {
 651                         lwi = LWI_TIMEOUT(obd_timeout * HZ, ost_bulk_timeout,
 652                                           desc);
 653                         rc = l_wait_event(desc->bd_waitq,
 654                                           ptlrpc_bulk_complete(desc), &lwi);
 655                         if (rc) {
 656                                 LASSERT(rc == -ETIMEDOUT);
 657                                 CERROR("timeout waiting for bulk GET\n");
 658                                 ptlrpc_abort_bulk(desc);
 659                         }
 660                 } else {
 661                         CERROR("ptlrpc_bulk_get failed RC: %d\n", rc);
 662                 }
 663                 comms_error = rc != 0;
 664         }
 665
 666         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 667         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 668
 669 #if CHECKSUM_BULK
 670         if (rc == 0 && (body->oa.o_valid & OBD_MD_FLCKSUM) != 0) {
 671                 static int cksum_counter;
 672                 __u64 client_cksum = body->oa.o_rdev;
 673                 __u64 cksum = ost_checksum_bulk(desc);
 674
 675                 if (client_cksum != cksum) {
 676                         CERROR("Bad checksum: client "LPX64", server "LPX64
 677                                ", client NID "LPX64"\n", client_cksum, cksum,
 678                                req->rq_connection->c_peer.peer_nid);
 679                         cksum_counter = 1;
 680                         repbody->oa.o_rdev = cksum;
 681                 } else {
 682                         cksum_counter++;
 683                         if ((cksum_counter & (-cksum_counter)) == cksum_counter)
 684                                 CERROR("Checksum %d from "LPX64": "LPX64" OK\n",
 685                                         cksum_counter,
 686                                         req->rq_connection->c_peer.peer_nid,
 687                                         cksum);
 688                 }
 689         }
 690 #endif
 691         /* Must commit after prep above in all cases */
 692         rc2 = obd_commitrw(OBD_BRW_WRITE, req->rq_export, &repbody->oa,
 693                            objcount, ioo, npages, local_nb, oti);
 694
 695         if (rc == 0) {
 696                 /* set per-requested niobuf return codes */
 697                 for (i = j = 0; i < niocount; i++) {
 698                         int nob = remote_nb[i].len;
 699
 700                         rcs[i] = 0;
 701                         do {
 702                                 LASSERT(j < npages);
 703                                 if (local_nb[j].rc < 0)
 704                                         rcs[i] = local_nb[j].rc;
 705                                 nob -= pp_rnb[j].len;
 706                                 j++;
 707                         } while (nob > 0);
 708                         LASSERT(nob == 0);
 709                 }
 710                 LASSERT(j == npages);
 711         }
 712         if (rc == 0)
 713                 rc = rc2;
 714
 715  out_bulk:
 716         ptlrpc_free_bulk(desc);
 717  out_local:
 718         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 719  out_pp_rnb:
 720         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 721  out:
 722         if (rc == 0) {
 723                 oti_to_request(oti, req);
 724                 rc = ptlrpc_reply(req);
 725         } else if (!comms_error) {
 726                 /* Only reply if there was no comms problem with bulk */
 727                 req->rq_status = rc;
 728                 ptlrpc_error(req);
 729         } else {
 730                 if (req->rq_repmsg != NULL) {
 731                         /* reply out callback would free */
 732                         OBD_FREE (req->rq_repmsg, req->rq_replen);
 733                 }
 734                 CERROR("bulk IO comms error: evicting %s@%s nid "LPU64"\n",
 735                        req->rq_export->exp_client_uuid.uuid,
 736                        req->rq_connection->c_remote_uuid.uuid,
 737                        req->rq_connection->c_peer.peer_nid);
 738                 ptlrpc_fail_export(req->rq_export);
 739         }
 740         RETURN(rc);
 741 }
 742
 743 static int ost_san_brw(struct ptlrpc_request *req, int cmd)
 744 {
 745         struct niobuf_remote *remote_nb, *res_nb;
 746         struct obd_ioobj *ioo;
 747         struct ost_body *body, *repbody;
 748         int rc, i, j, objcount, niocount, size[2] = {sizeof(*body)};
 749         int n;
 750         int swab;
 751         ENTRY;
 752
 753         /* XXX not set to use latest protocol */
 754
 755         swab = lustre_msg_swabbed(req->rq_reqmsg);
 756         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 757         if (body == NULL) {
 758                 CERROR("Missing/short ost_body\n");
 759                 GOTO(out, rc = -EFAULT);
 760         }
 761
 762         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 763         if (ioo == NULL) {
 764                 CERROR("Missing/short ioobj\n");
 765                 GOTO(out, rc = -EFAULT);
 766         }
 767         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 768         niocount = ioo[0].ioo_bufcnt;
 769         for (i = 1; i < objcount; i++) {
 770                 if (swab)
 771                         lustre_swab_obd_ioobj (&ioo[i]);
 772                 niocount += ioo[i].ioo_bufcnt;
 773         }
 774
 775         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 776                                        lustre_swab_niobuf_remote);
 777         if (remote_nb == NULL) {
 778                 CERROR("Missing/short niobuf\n");
 779                 GOTO(out, rc = -EFAULT);
 780         }
 781         if (swab) {                             /* swab the remaining niobufs */
 782                 for (i = 1; i < niocount; i++)
 783                         lustre_swab_niobuf_remote (&remote_nb[i]);
 784         }
 785
 786         for (i = n = 0; i < objcount; i++) {
 787                 for (j = 0; j < ioo[i].ioo_bufcnt; j++, n++) {
 788                         if (remote_nb[n].len == 0) {
 789                                 CERROR("zero len BRW: objid "LPX64" buf %u\n",
 790                                        ioo[i].ioo_id, j);
 791                                 GOTO(out, rc = -EINVAL);
 792                         }
 793                         if (j && remote_nb[n].offset <= remote_nb[n-1].offset) {
 794                                 CERROR("unordered BRW: objid "LPX64
 795                                        " buf %u offset "LPX64" <= "LPX64"\n",
 796                                        ioo[i].ioo_id, j, remote_nb[n].offset,
 797                                        remote_nb[n-1].offset);
 798                                 GOTO(out, rc = -EINVAL);
 799                         }
 800                 }
 801         }
 802
 803         size[1] = niocount * sizeof(*remote_nb);
 804         rc = lustre_pack_msg(2, size, NULL, &req->rq_replen, &req->rq_repmsg);
 805         if (rc)
 806                 GOTO(out, rc);
 807
 808         req->rq_status = obd_san_preprw(cmd, req->rq_export, &body->oa,
 809                                         objcount, ioo, niocount, remote_nb);
 810
 811         if (req->rq_status)
 812                 GOTO(out, rc = 0);
 813
 814         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 815         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 816
 817         res_nb = lustre_msg_buf(req->rq_repmsg, 1, size[1]);
 818         memcpy(res_nb, remote_nb, size[1]);
 819         rc = 0;
 820 out:
 821         if (rc) {
 822                 OBD_FREE(req->rq_repmsg, req->rq_replen);
 823                 req->rq_repmsg = NULL;
 824                 req->rq_status = rc;
 825                 ptlrpc_error(req);
 826         } else
 827                 ptlrpc_reply(req);
 828
 829         return rc;
 830 }
 831
 832 static int ost_log_cancel(struct ptlrpc_request *req)
 833 {
 834         struct lustre_handle *conn;
 835         struct llog_cookie *logcookies;
 836         int num_cookies, rc = 0;
 837         ENTRY;
 838
 839         logcookies = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*logcookies));
 840         if (logcookies == NULL) {
 841                 DEBUG_REQ(D_HA, req, "no cookies sent");
 842                 RETURN(-EFAULT);
 843         }
 844         num_cookies = req->rq_reqmsg->buflens[0] / sizeof(*logcookies);
 845
 846         /* workaround until we don't need to send replies */
 847         rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
 848         if (rc)
 849                 RETURN(rc);
 850         req->rq_repmsg->status = 0;
 851         /* end workaround */
 852
 853         conn = (struct lustre_handle *)&req->rq_reqmsg->handle;
 854         rc = obd_log_cancel(conn, NULL, num_cookies, logcookies, 0);
 855
 856         RETURN(rc);
 857 }
 858
 859 static int ost_set_info(struct ptlrpc_request *req)
 860 {
 861         struct lustre_handle *conn;
 862         char *key;
 863         int keylen, rc = 0;
 864         ENTRY;
 865
 866         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 867         if (key == NULL) {
 868                 DEBUG_REQ(D_HA, req, "no set_info key");
 869                 RETURN(-EFAULT);
 870         }
 871         keylen = req->rq_reqmsg->buflens[0];
 872
 873         rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
 874         if (rc)
 875                 RETURN(rc);
 876
 877         conn = (struct lustre_handle *)&req->rq_reqmsg->handle;
 878         rc = obd_set_info(conn, keylen, key, 0, NULL);
 879         req->rq_repmsg->status = 0;
 880         RETURN(rc);
 881 }
 882
 883 static int filter_recovery_request(struct ptlrpc_request *req,
 884                                    struct obd_device *obd, int *process)
 885 {
 886         switch (req->rq_reqmsg->opc) {
 887         case OST_CONNECT: /* This will never get here, but for completeness. */
 888         case OST_DISCONNECT:
 889                *process = 1;
 890                RETURN(0);
 891
 892         case OBD_PING:
 893         case OST_CLOSE:
 894         case OST_CREATE:
 895         case OST_DESTROY:
 896         case OST_OPEN:
 897         case OST_PUNCH:
 898         case OST_SETATTR:
 899         case OST_SYNCFS:
 900         case OST_WRITE:
 901         case OBD_LOG_CANCEL:
 902         case LDLM_ENQUEUE:
 903                 *process = target_queue_recovery_request(req, obd);
 904                 RETURN(0);
 905
 906         default:
 907                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
 908                 *process = 0;
 909                 /* XXX what should we set rq_status to here? */
 910                 req->rq_status = -EAGAIN;
 911                 RETURN(ptlrpc_error(req));
 912         }
 913 }
 914
 915
 916
 917 static int ost_handle(struct ptlrpc_request *req)
 918 {
 919         struct obd_trans_info trans_info = { 0, };
 920         struct obd_trans_info *oti = &trans_info;
 921         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
 922         ENTRY;
 923
 924         /* XXX identical to MDS */
 925         if (req->rq_reqmsg->opc != OST_CONNECT) {
 926                 struct obd_device *obd;
 927                 int abort_recovery, recovering;
 928
 929                 if (req->rq_export == NULL) {
 930                         CDEBUG(D_HA, "operation %d on unconnected OST\n",
 931                                req->rq_reqmsg->opc);
 932                         req->rq_status = -ENOTCONN;
 933                         GOTO(out, rc = -ENOTCONN);
 934                 }
 935
 936                 obd = req->rq_export->exp_obd;
 937
 938                 /* Check for aborted recovery. */
 939                 spin_lock_bh(&obd->obd_processing_task_lock);
 940                 abort_recovery = obd->obd_abort_recovery;
 941                 recovering = obd->obd_recovering;
 942                 spin_unlock_bh(&obd->obd_processing_task_lock);
 943                 if (abort_recovery) {
 944                         target_abort_recovery(obd);
 945                 } else if (recovering) {
 946                         rc = filter_recovery_request(req, obd, &should_process);
 947                         if (rc || !should_process)
 948                                 RETURN(rc);
 949                 }
 950         }
 951
 952         if (strcmp(req->rq_obd->obd_type->typ_name, "ost") != 0)
 953                 GOTO(out, rc = -EINVAL);
 954
 955         oti_init(oti, req);
 956
 957         switch (req->rq_reqmsg->opc) {
 958         case OST_CONNECT:
 959                 CDEBUG(D_INODE, "connect\n");
 960                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 961                 rc = target_handle_connect(req, ost_handle);
 962                 break;
 963         case OST_DISCONNECT:
 964                 CDEBUG(D_INODE, "disconnect\n");
 965                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 966                 rc = target_handle_disconnect(req);
 967                 break;
 968         case OST_CREATE:
 969                 CDEBUG(D_INODE, "create\n");
 970                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 971                 rc = ost_create(req, oti);
 972                 break;
 973         case OST_DESTROY:
 974                 CDEBUG(D_INODE, "destroy\n");
 975                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 976                 rc = ost_destroy(req, oti);
 977                 break;
 978         case OST_GETATTR:
 979                 CDEBUG(D_INODE, "getattr\n");
 980                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 981                 rc = ost_getattr(req);
 982                 break;
 983         case OST_SETATTR:
 984                 CDEBUG(D_INODE, "setattr\n");
 985                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 986                 rc = ost_setattr(req, oti);
 987                 break;
 988         case OST_OPEN:
 989                 CDEBUG(D_INODE, "open\n");
 990                 OBD_FAIL_RETURN(OBD_FAIL_OST_OPEN_NET, 0);
 991                 rc = ost_open(req, oti);
 992                 break;
 993         case OST_CLOSE:
 994                 CDEBUG(D_INODE, "close\n");
 995                 OBD_FAIL_RETURN(OBD_FAIL_OST_CLOSE_NET, 0);
 996                 rc = ost_close(req, oti);
 997                 break;
 998         case OST_WRITE:
 999                 CDEBUG(D_INODE, "write\n");
1000                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1001                 rc = ost_brw_write(req, oti);
1002                 /* ost_brw sends its own replies */
1003                 RETURN(rc);
1004         case OST_READ:
1005                 CDEBUG(D_INODE, "read\n");
1006                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1007                 rc = ost_brw_read(req);
1008                 /* ost_brw sends its own replies */
1009                 RETURN(rc);
1010         case OST_SAN_READ:
1011                 CDEBUG(D_INODE, "san read\n");
1012                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1013                 rc = ost_san_brw(req, OBD_BRW_READ);
1014                 /* ost_san_brw sends its own replies */
1015                 RETURN(rc);
1016         case OST_SAN_WRITE:
1017                 CDEBUG(D_INODE, "san write\n");
1018                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1019                 rc = ost_san_brw(req, OBD_BRW_WRITE);
1020                 /* ost_san_brw sends its own replies */
1021                 RETURN(rc);
1022         case OST_PUNCH:
1023                 CDEBUG(D_INODE, "punch\n");
1024                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
1025                 rc = ost_punch(req, oti);
1026                 break;
1027         case OST_STATFS:
1028                 CDEBUG(D_INODE, "statfs\n");
1029                 OBD_FAIL_RETURN(OBD_FAIL_OST_STATFS_NET, 0);
1030                 rc = ost_statfs(req);
1031                 break;
1032         case OST_SYNCFS:
1033                 CDEBUG(D_INODE, "sync\n");
1034                 OBD_FAIL_RETURN(OBD_FAIL_OST_SYNCFS_NET, 0);
1035                 rc = ost_syncfs(req);
1036                 break;
1037         case OST_SET_INFO:
1038                 DEBUG_REQ(D_INODE, req, "set_info");
1039                 rc = ost_set_info(req);
1040         case OBD_PING:
1041                 DEBUG_REQ(D_INODE, req, "ping");
1042                 rc = target_handle_ping(req);
1043                 break;
1044         case OBD_LOG_CANCEL:
1045                 CDEBUG(D_INODE, "log cancel\n");
1046                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1047                 rc = ost_log_cancel(req);
1048                 break;
1049         case LDLM_ENQUEUE:
1050                 CDEBUG(D_INODE, "enqueue\n");
1051                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1052                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1053                                          ldlm_server_blocking_ast);
1054                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
1055                 break;
1056         case LDLM_CONVERT:
1057                 CDEBUG(D_INODE, "convert\n");
1058                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1059                 rc = ldlm_handle_convert(req);
1060                 break;
1061         case LDLM_CANCEL:
1062                 CDEBUG(D_INODE, "cancel\n");
1063                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
1064                 rc = ldlm_handle_cancel(req);
1065                 break;
1066         case LDLM_BL_CALLBACK:
1067         case LDLM_CP_CALLBACK:
1068                 CDEBUG(D_INODE, "callback\n");
1069                 CERROR("callbacks should not happen on OST\n");
1070                 /* fall through */
1071         default:
1072                 CERROR("Unexpected opcode %d\n", req->rq_reqmsg->opc);
1073                 req->rq_status = -ENOTSUPP;
1074                 rc = ptlrpc_error(req);
1075                 RETURN(rc);
1076         }
1077
1078         EXIT;
1079         /* If we're DISCONNECTing, the export_data is already freed */
1080         if (!rc && req->rq_reqmsg->opc != OST_DISCONNECT) {
1081                 struct obd_device *obd  = req->rq_export->exp_obd;
1082                 if (!obd->obd_no_transno) {
1083                         req->rq_repmsg->last_committed =
1084                                 obd->obd_last_committed;
1085                 } else {
1086                         DEBUG_REQ(D_IOCTL, req,
1087                                   "not sending last_committed update");
1088                 }
1089                 CDEBUG(D_INFO, "last_committed "LPU64", xid "LPX64"\n",
1090                        obd->obd_last_committed, req->rq_xid);
1091         }
1092
1093 out:
1094         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1095                 struct obd_device *obd = req->rq_export->exp_obd;
1096
1097                 if (obd && obd->obd_recovering) {
1098                         DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1099                         return target_queue_final_reply(req, rc);
1100                 }
1101                 /* Lost a race with recovery; let the error path DTRT. */
1102                 rc = req->rq_status = -ENOTCONN;
1103         }
1104
1105         if (!rc)
1106                 oti_to_request(oti, req);
1107
1108         target_send_reply(req, rc, fail);
1109         return 0;
1110 }
1111
1112 static int ost_setup(struct obd_device *obddev, obd_count len, void *buf)
1113 {
1114         struct ost_obd *ost = &obddev->u.ost;
1115         int err, i;
1116         ENTRY;
1117
1118 #ifdef ENABLE_ORPHANS
1119         err = llog_start_commit_thread();
1120         if (err < 0)
1121                 RETURN(err);
1122 #endif
1123
1124         ost->ost_service = ptlrpc_init_svc(OST_NEVENTS, OST_NBUFS,
1125                                            OST_BUFSIZE, OST_MAXREQSIZE,
1126                                            OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
1127                                            ost_handle, "ost", obddev);
1128         if (!ost->ost_service) {
1129                 CERROR("failed to start service\n");
1130                 RETURN(-ENOMEM);
1131         }
1132
1133         for (i = 0; i < OST_NUM_THREADS; i++) {
1134                 char name[32];
1135                 sprintf(name, "ll_ost_%02d", i);
1136                 err = ptlrpc_start_thread(obddev, ost->ost_service, name);
1137                 if (err) {
1138                         CERROR("error starting thread #%d: rc %d\n", i, err);
1139                         RETURN(-EINVAL);
1140                 }
1141         }
1142
1143         RETURN(0);
1144 }
1145
1146 static int ost_cleanup(struct obd_device *obddev, int flags)
1147 {
1148         struct ost_obd *ost = &obddev->u.ost;
1149         int err = 0;
1150         ENTRY;
1151
1152         if (obddev->obd_recovering)
1153                 target_cancel_recovery_timer(obddev);
1154
1155         ptlrpc_stop_all_threads(ost->ost_service);
1156         ptlrpc_unregister_service(ost->ost_service);
1157
1158         RETURN(err);
1159 }
1160
1161 int ost_attach(struct obd_device *dev, obd_count len, void *data)
1162 {
1163         struct lprocfs_static_vars lvars;
1164
1165         lprocfs_init_vars(ost,&lvars);
1166         return lprocfs_obd_attach(dev, lvars.obd_vars);
1167 }
1168
1169 int ost_detach(struct obd_device *dev)
1170 {
1171         return lprocfs_obd_detach(dev);
1172 }
1173
1174 /* I don't think this function is ever used, since nothing
1175  * connects directly to this module.
1176  */
1177 static int ost_connect(struct lustre_handle *conn,
1178                        struct obd_device *obd, struct obd_uuid *cluuid)
1179 {
1180         struct obd_export *exp;
1181         int rc;
1182         ENTRY;
1183
1184         if (!conn || !obd || !cluuid)
1185                 RETURN(-EINVAL);
1186
1187         rc = class_connect(conn, obd, cluuid);
1188         if (rc)
1189                 RETURN(rc);
1190         exp = class_conn2export(conn);
1191         LASSERT(exp);
1192         class_export_put(exp);
1193
1194         RETURN(0);
1195 }
1196
1197 /* use obd ops to offer management infrastructure */
1198 static struct obd_ops ost_obd_ops = {
1199         o_owner:        THIS_MODULE,
1200         o_attach:       ost_attach,
1201         o_detach:       ost_detach,
1202         o_setup:        ost_setup,
1203         o_cleanup:      ost_cleanup,
1204         o_connect:      ost_connect,
1205 };
1206
1207 static int __init ost_init(void)
1208 {
1209         struct lprocfs_static_vars lvars;
1210         ENTRY;
1211
1212         lprocfs_init_vars(ost,&lvars);
1213         RETURN(class_register_type(&ost_obd_ops, lvars.module_vars,
1214                                    LUSTRE_OST_NAME));
1215 }
1216
1217 static void /*__exit*/ ost_exit(void)
1218 {
1219         class_unregister_type(LUSTRE_OST_NAME);
1220 }
1221
1222 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1223 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
1224 MODULE_LICENSE("GPL");
1225
1226 module_init(ost_init);
1227 module_exit(ost_exit);